Plasma theme with 70% opacity for panel and widgets along with blur effect for both.

Extract the breeze_blurred folder to $HOME/.local/share/plasma/desktoptheme

Before installing breeze blurred 2, remove breeze blurred

[Version 2.0.0.2]
Fixed certain cases when transparency was not applied

[Version 2.0.0.1]
Minor tweaks to appearance

[Version 2.0.0.0]
Added support for plasma 5.25 and above

[Version 1.0.0.3]
Also added adaptive transparency (panel becomes opaque when windows maximised). Can be changed by Right Click panel>Edit Mode>More options